Still no luck. Here is the error message and details:
calibre, version 4.13.0 ERROR: Unhandled exception: <b>KeyError</b>:u'extensions'
calibre 4.13 embedded-python: True is64bit: True Darwin-19.4.0-x86_64-i386-64bit Darwin ('64bit', '') ('Darwin', '19.4.0', 'Darwin Kernel Version 19.4.0: Wed Mar 4 22:28:40 PST 2020; root:xnu-6153.101.6~15/RELEASE_X86_64') Python 2.7.16 OSX: ('10.15.4', ('', '', ''), 'x86_64') Interface language: None Traceback (most recent call last): File "site-packages/calibre/gui2/dialogs/choose_format.py", line 83, in choose_open_with File "site-packages/calibre/gui2/open_with.py", line 326, in choose_program File "site-packages/calibre/gui2/open_with.py", line 158, in finalize_entry KeyError: u'extensions'
Still no luck. Here is the error message and details:
calibre, version 4.13.0 /b>:u'extension s'
ERROR: Unhandled exception: <b>KeyError<
calibre 4.13 embedded-python: True is64bit: True 19.4.0- x86_64- i386-64bit Darwin ('64bit', '') 6153.101. 6~15/RELEASE_ X86_64' ) calibre/ gui2/dialogs/ choose_ format. py", line 83, in choose_open_with calibre/ gui2/open_ with.py" , line 326, in choose_program calibre/ gui2/open_ with.py" , line 158, in finalize_entry
Darwin-
('Darwin', '19.4.0', 'Darwin Kernel Version 19.4.0: Wed Mar 4 22:28:40 PST 2020; root:xnu-
Python 2.7.16
OSX: ('10.15.4', ('', '', ''), 'x86_64')
Interface language: None
Traceback (most recent call last):
File "site-packages/
File "site-packages/
File "site-packages/
KeyError: u'extensions'